• Warning lights on the dashboard
• Malfunctioning vehicle systems
• Intermittent electrical issues
• Faulty control module
• Damaged wiring or connectors
• Network communication error
OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.
Module: An electronic control unit in the vehicle.
• U0100
• U0121
This code means that one part of the car isn't talking to another part like it should. It's like if your phone couldn't connect to the internet.
U0668 indicates a communication problem between different modules in the vehicle.
The U0668 code is a generic communication fault code for a lost communication with a specific module or control unit in the vehicle's network. This means that one of the vehicle's control modules is not able to communicate with the main computer or other modules.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Check the power and ground connections to the affected module.
• Repair or replace damaged wiring or connectors.
• Replace the faulty control module.
• Reprogram the module if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Ensure all connections are secure
• Avoid moisture exposure to electrical components
Communication Error
• Have a professional diagnose the issue.
• Avoid DIY repairs unless experienced with vehicle electronics.
Check your vehicle's warranty coverage for electrical components.
This code has been common in vehicles with complex electronic systems since the early 2000s.
Moderate – It should be addressed soon to prevent further issues.
Driving with this issue may affect vehicle performance and safety systems.
• Vehicle must be in a safe, stationary position.
• Ensure the ignition is on but the engine is not running.
The affected module is usually located under the dashboard or in the engine bay.
Q: Can I drive my car with a U0668 code?
A: It's possible, but not recommended as it may affect vehicle performance.
Q: How can I clear the U0668 code?
A: You can clear the code with an OBD-II scanner, but it's important to fix the underlying issue first.
